Chemical detergent block



FIG. 1 is a perspective view of a chemical block showing our new design;

FIG. 2 is a side elevational view;

FIG. 3 is an opposite side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a chemical detergent block, as shown and described. 